ICHTHYOLOGICAL COLLECTIONS OF THE ALBA.TROSS. 467 



Dorsal spines very sleuder, the fourth the longest, or the fourth and fifth equal, 

 contained 2J to 2| in length of head. Dorsal very deeply notched, the twelfth spine 

 but one-fourth as long as the longest, and barely connected at base with the elev- 

 enth. Soft dorsal scarcely as high as the spinous. First anal spine very short, the 

 second very slightly stronger than the third, and nearly or quite as long measured 

 from base, its length 3k in head. The second spine appears much shorter than the 

 third when the fin is declined. Longest soft ray of anal 2g^ in head. Caudal deeply 

 notched. Anus anterior in position, midway between first anal spine and base of 

 ventrals; the tips of the ventrals extend to or beyond it, and the pectorals extend 

 beyond tips of ventrals. 



D. XIII, 14 or 15; A. iii, 9 or 10. Pores in lateral line, 54 to 58. 



Scales small, everywhere ctenoid, entirely covering head, including maxillaries, 

 mandibles, and snout, except a triangular area on top of snout, beneath which lie the 

 premaxillary spines. Color as in S. goodei, dusky olive above, bright silvery on sides 

 of head and body and below ; probably with some red in life. Fins unmarked. 

 Mouth and gill-cavities pure white, the peritoneum jet black. 



Specimens ranging in size from 165 mm. to 215 mm. from stations 2935, 3103, and 

 3114; depths 62 to 124 fathoms. 



Named for David Starr Jordan, president of the Lelaud Stanford Junior University, 

 the most successful worker in the genus Sebastodes. 



39. Sebastodes saxicola (Gilbert). 



Stations 3103, 3104, 3113, 3114, 3115, 3125, 3129, 3161, 3183, 3184, 3189, 3192, 3194, 3196, 

 3197, 3206, 3207, 3208, and 3209; depths 43 to 391 fathoms. 



Gill-rakers constantly 10+22 or 23. The second anal spine varies somewhat in 

 length, always extending slightly beyond tip of third anal spine when the fin is 

 declined, usually not reaching tips of soft anal rays, its length 2i to 2| in that of 

 head. Young specimens have faint dark bars occupying usual position; a jet-black 

 blotch on middle of soft dorsal with a light streak below it separating it from the 

 back. 



40. Sebastodes diploproa (Gilbert). 



Stations 3105, 3129, 3161, 3170, 3188, 3189, 3191, 3193, 3195, 3196, 3197, 3204, and 

 3208; depths 160 to 316 fathoms, excepting station 3197 (77 fathoms), from which 

 there are 11 young specimens 2 to 3 inches long, supposed to belong to this species. 

 All these show the characteristic silvery-white coloration on lower half of sides. 

 There are traces of dark bars on the sides; one on nape and under front of spinous 

 dorsal; two on sides diverging downward from behind middle of spinous dorsal; 

 one under middle of soft dorsal. There are corresponding dusky marks on the fins, 

 that on soft dorsal being a distinct blackish blotch. The projecting lobes of the 

 premaxillaries are evident in the youngest specimens. Fins and spines of head 

 about as in adults. 



The gill-rakers in this species are 9 or 10 -[- 23 to 25. The maxillary is 2^ to 2| in 

 lead. The interorbital space is very slightly more than one-half eye. The ventral 

 fins extend nearly to vent. Pectorals If in head. There is considerable variation in 

 the direction of the upper preopercular spines, which are directed sometimes straight 

 forward, sometimes obliquely forward and doAvnward. Lower preorbital .si)ine 

 ■directed obliquely downward and backward. 



41. Sebastodes aurora (Gilbert). 



Stations 3195, 3199, and 3205 ; depths 233 to 252 fathoms. Gill-rakers very large 

 and thick, comparatively few in number, 7 on vertical limb, and 14 or 15 movable 

 ones and about 3 tubercles on horizontal limb of gill-arch. The coronal spines are 

 an inconstant feature of this species, absent nearly as often as present. In one 

 specimen a slight prominence on one side indicates its position. 



42. Sebastodes rhodochloris (Jordan & Gilbert). Flyfish. 



Stations 3183 and 3189; depths 162 and 218 fathoms. Gill-rakers 6 + 18. 



